Share a LED light control program Based on ZigBee Light Link protocol

ZigBee Light Control Solution Overview:

The scheme is research and development based on TI CC2530 chip,it uses a smart phone APP interface control,support apple IOS and Android mobile devices control at the same time.  So you can do multiple light control, setting the scene, brightness adjustment, RGB color reproduction conditioning and cloud management mode settings through smart phones and tablet PCs. It replaces the 433MHz, WIFI, Bluetooth wireless technology lighting control solutions. LED lamps which are simply follow ZLL standard protocol compatible can be used.

ZigBee lighting control program key performance indicators:

1.       Remote control distance: 30m

2.       Remote control mode: Smartphone with WiFi (Apple IOS, Google Android)

3.       Operation: APP interface operation

4.       Connection protocol: WIFI, ZigBee

5.       Control mode: Brightness adjustment, RGB color adjustment, scene settings

Block diagram of ZigBee lighting control solutions:

ZLL bulb internal structure diagram

1.       DC power supply all the way to the constant current driver IC, and power supply to the CC2530 chip through LDO.

2.       CC2530 chip outputs four PWM signals to control the output current of the constant current driver IC;

3.       Constant current driver IC according to the PWM signal to control the output constant current drive LED light;

4.       By ZLL wireless network control CC2530 chip four PWM signal output, thereby controlling the constant current driver IC output current to drive RGBW LED light, synthesize different color effects;

ZigBee lighting control design difficulties and solutions:

a.       Software

Due to the lack of professional calibration tool, once the color deviation, it is difficult to adjust; Solution: By analyzing the parameters of LED lamp diagram, the use of software on various parameters appropriate compensation;

b.       Hardware

1.       Bulb shape mainly focus on the customer’s first impression, and the actual cooling effect, and process costs, we may follow compromise on these points.

2.       Circuit design, employee of the industry a few years ago using a constant voltage control LED, the LED in this way compare accelerated aging, so we take a detour early.

3.       RGBW color is based on the flux ratio of 3:6:1 RGB to elect the number of devices or control current, while the selection of the LED have a great relationship, we must take look at the main wavelength R :615-620NM, G :530-540nm, B :460-470nm ratio, of course, to improve the color (color authenticity) can be added to yellow (580nm) to be used in the actual use of different layouts and different LED test be repeated several times finalized.

ZigBee Light Link control terminal:

Support equipment: Apple IOS mobile smart devices, Google Andriod mobile smart devices, Windows Mobile smart devices

ZigBee lighting control solutions figure:

ZigBee lighting control solutions prospects and significance:

Based on ZigBee Light Link protocol LED lights intelligent home control solutions not only improve the lighting control mode, but also to promote the standardization of ZigBee products. Currently, this program respected by the major lighting manufacturers, is in full swing to develop, I believe that in the near future, you can achieve wireless lighting control between those LED lamps from different manufacturers.